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MDU Resources Group, Inc., a member of the S&P MidCap 400 index, provides essential products and services through its business lines, including utility companies Cascade Natural Gas Corp., …
MDU Resources Group, Inc., a member of the S&P MidCap 400 index, provides essential products and services through its business lines, including utility companies Cascade Natural Gas Corp., Intermountain Gas Co. and Montana-Dakota Utilities Co.; natural gas transportation and storage business, WBI Energy, Inc.; and construction services business, MDU Construction Services Group, Inc. For more information about MDU Resources, see the company's website.